<template>
  <Select
    placeholder="请选择"
    :fieldNames="fieldNames"
    @change="handleChange"
    :options="getOptions"
    v-model:value="state"
  >
  </Select>
</template>
<script lang="ts">
import { defineComponent, PropType, ref, watchEffect, computed, unref, watch } from "vue";
import { Select } from "ant-design-vue";
import { isFunction } from "/@/utils/is";
import { useRuleFormItem } from "/@/hooks/component/useFormItem";
import { useAttrs } from "/@/hooks/core/useAttrs";
import { get, omit } from "lodash-es";
import { LoadingOutlined } from "@ant-design/icons-vue";
import { useI18n } from "/@/hooks/web/useI18n";
import { propTypes } from "/@/utils/propTypes";

type OptionsItem = { label: string; value: string; disabled?: boolean };

export default defineComponent({
  name: "ApiSelect",
  components: {
    Select,
    LoadingOutlined,
  },
  inheritAttrs: false,
  props: {
    value: [Array, Object, String, Number],
    numberToString: propTypes.bool,
    api: {
      type: Function as PropType<(arg?: Recordable) => Promise<OptionsItem[]>>,
      default: null,
    },
    // api params
    params: {
      type: Object as PropType<Recordable>,
      default: () => ({}),
    },
    // support xxx.xxx.xx
    resultField: propTypes.string.def(""),
    labelField: propTypes.string.def("name"),
    valueField: propTypes.string.def("id"),
    immediate: propTypes.bool.def(true),
  },
  emits: ["options-change", "change"],
  setup(props, { emit }) {
    const options = ref<OptionsItem[]>([]);
    const loading = ref(false);
    const isFirstLoad = ref(true);
    const emitData = ref<any[]>([]);
    const attrs = useAttrs();
    const { t } = useI18n();

    // Embedded in the form, just use the hook binding to perform form verification
    const [state, setState] = useRuleFormItem(props, "value", "change", emitData);

    const getOptions = computed(() => {
      const { labelField, valueField, numberToString } = props;
      return unref(options).reduce((prev, next: Recordable) => {
        if (next) {
          const value = next[valueField];
          prev.push({
            ...omit(next, [labelField, valueField]),
            label: next[labelField],
            value: numberToString ? `${value}` : value,
          });
        }
        return prev;
      }, [] as OptionsItem[]);
    });

    watchEffect(() => {
      props.immediate && fetch();
    });

    watch(
      () => props.params,
      () => {
        !unref(isFirstLoad) && fetch();
      },
      { deep: true }
    );

    async function fetch() {
      const api = props.api;
      if (!api || !isFunction(api)) return;
      options.value = [];
      try {
        loading.value = true;
        const res = await api(props.params);
        options.value = res.data.entities;
        emitChange();
      } catch (error) {
        console.warn(error);
      } finally {
        loading.value = false;
        //--@updateBy-begin----author:liusq---date:20210914------for:判断选择模式，multiple多选情况下的value值空的情况下需要设置为数组------
        unref(attrs).mode == "multiple" && !Array.isArray(unref(state)) && setState([]);
        //--@updateBy-end----author:liusq---date:20210914------for:判断选择模式，multiple多选情况下的value值空的情况下需要设置为数组------

        //update-begin---author:wangshuai ---date:20230505  for：初始化value值，如果是多选字符串的情况下显示不出来------------
        initValue();
        //update-end---author:wangshuai ---date:20230505  for：初始化value值，如果是多选字符串的情况下显示不出来------------
      }
    }

    function initValue() {
      let value = props.value;
      if (value && typeof value === "string" && value != "null" && value != "undefined") {
        state.value = value.split(",");
      }
    }

    async function handleFetch() {
      if (!props.immediate && unref(isFirstLoad)) {
        await fetch();
        isFirstLoad.value = false;
      }
    }

    function emitChange() {
      emit("options-change", unref(getOptions));
    }

    function handleChange(_, ...args) {
      emitData.value = args;
    }

    const fieldNames = {
      label: "name",
      value: "id",
    };

    return {
      state,
      attrs,
      getOptions,
      loading,
      fieldNames,
      t,
      handleFetch,
      handleChange,
    };
  },
});
</script>
